i have a 97 chevy truck with a 4.3.the truck starts and runs at an idle great.if you try to accel the engine either in or out of gear it stumbles to the point of stalling.i have already done the basics.all tune-up parts down to the fuel filter up to the air filter (plugs wires cap rotor ect.............)are all new and exact gm replacements no after market.new fuel pump clean and full tank of gas.fuel pressure test all within spec.no codes other than o2 sensor bank 1 sensor 1and 2 low voltage.but truck had run fine with these codes for 5 years.have already tried the coil and all associated pieces.
Aug 27, 2008 at 4:56 AM